diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/fadump.c | 9 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 22 |
2 files changed, 30 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index dd2c85f0bd8d..e1431800bfb9 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -125,6 +125,13 @@ int is_fadump_boot_memory_area(u64 addr, ulong size) return (addr + size) > RMA_START && addr <= fw_dump.boot_memory_size; } +int should_fadump_crash(void) +{ + if (!fw_dump.dump_registered || !fw_dump.fadumphdr_addr) + return 0; + return 1; +} + int is_fadump_active(void) { return fw_dump.dump_active; @@ -518,7 +525,7 @@ void crash_fadump(struct pt_regs *regs, const char *str) struct fadump_crash_info_header *fdh = NULL; int old_cpu, this_cpu; - if (!fw_dump.dump_registered || !fw_dump.fadumphdr_addr) + if (!should_fadump_crash()) return; /* diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 5e4db2fc2add..6858d910b47e 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -114,6 +114,28 @@ static void pmac_backlight_unblank(void) static inline void pmac_backlight_unblank(void) { } #endif +/* + * If oops/die is expected to crash the machine, return true here. + * + * This should not be expected to be 100% accurate, there may be + * notifiers registered or other unexpected conditions that may bring + * down the kernel. Or if the current process in the kernel is holding + * locks or has other critical state, the kernel may become effectively + * unusable anyway. + */ +bool die_will_crash(void) +{ + if (should_fadump_crash()) + return true; + if (kexec_should_crash(current)) + return true; + if (in_interrupt() || panic_on_oops || + !current->pid || is_global_init(current)) + return true; + + return false; +} + static arch_spinlock_t die_lock = __ARCH_SPIN_LOCK_UNLOCKED; static int die_owner = -1; static unsigned int die_nest_count; |